Membrane reactors for hydrogen production from renewable energy sources

To create an emission-free energy supply for the future, an increased expansion and integration of renewable energies into the existing energy system is necessary. In this energy transition, hydrogen plays a key role. As a feedstock for syn-thetic fuels or chemicals, or as a fuel itself, hydrogen alleviates energy fluctuations caused by the highly volatile character of renewable energy sources. In many of the processes to hydrogen, membrane reactors are applied. They combine hydrogen production and separation in one unit and are therefore very compact. In this short review, recent de-velopments in membrane reactors in the framework of renewable energy via two examples, ammonia decomposition and biogas reforming are presented.